e e 41102 Peak pressurve measured by Sandia Corporation are ehown in Tadle I, in comparison with the predicted pressures from 12 MT for an ideal surface and homogeneous atmosphere. Pressure is essentially up to the ideal value at the closest distances, but are markedly reduced at long distances. On the basis of peak pressure, the apparent yield diminishes frou about 10.5 Mf at Engebi to less than 1 MY on Farry. Also, Bandia Corporation reports fast rise times in the pressure wave at the 23.6 pel level on Engebi; fast rise times as far out as Acmon (2.75 pei). Successively longer rise times occur BEST AVAILABLE COPY ey TABLE I yi Se lu eet Enged’, Mozin 26,000 =< 92, 500 Theoretion. Pressure : Measured Appareat 23.6 10.3 gempietied oret,O 26 wv 3 9.3 Aiton 36,500 5. 367 6.8 Aceon, 47,500 3.5 2.75 6.8 Banit 73,000 1.85 1.32 5.7 Perry 114,000 1.1 a 0.6 kates 186,000 A Cad 1.0 As expected, these requlta are distinctly different from DusterTsbler results, vhich ginerally bedslovrise tines and pressures,which were « factor of 2 or more below ideal at highpressures, but which hed sharp rise tines and close to ideal wilues at lowpressures, The results on MIKE are reasonable; ab high presiirée’‘andoverdiol surface, thepressures andware forms are in fact ideal. +. re"eet. Ope at lng distance, At longer distences, the atmospheric effects apparently do result ia a marked attenuationof peak proeeures. Further, at Long distances, ;